内蒙古上空的光柱
无数的细细的光柱将白雪覆盖的风景与繁星满天相连。通过彩色的光柱可以看到北斗七星。有关更多详细信息，请参阅说明。
天空中的于韦斯屈莱市
2024年1月25日 Jyväskylä in the Sky Image Credit & Copyright: Harri Kiiskinen Explanation: You might not immediately recognize this street map of a neighborhood in Jyväskylä, Finland, planet Earth. But that’s probably because the map was projected into the night sky and captured with an allsky camera on January 16. The temperature recorded on that northern winter night was around minus 20 degrees Celsius. As ice crystals formed in the atmosphere overhead, street lights spilling illumination into the sky above produced visible light pillars, their ethereal appearance due to specular reflections from the fluttering crystals’ flat surfaces. Of course, the projected light pillars trace a map of the brightly lit local streets, though reversed right to left in the upward looking camera’s view. This light pillar…
挪威上空的极光和光柱
2022年2月8日 Aurora and Light Pillars over Norway Image Credit & Copyright: Alexandre Correia Explanation: Which half of this sky is your favorite? On the left, the night sky is lit up by particles expelled from the Sun that later collided with Earth’s upper atmosphere — creating bright auroras. On the right, the night glows with ground lights reflected by millions of tiny ice crystals falling from the sky — creating light pillars. And in the center, the astrophotographer presents your choices. The light pillars are vertical columns because the fluttering ice-crystals are mostly flat to the ground, and their colors are those of the ground lights. The auroras cover the sky and ground in the green hue of glowing oxygen, while their transparency is clear…